From patchwork Tue May 28 02:59:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongxing Zhu X-Patchwork-Id: 13676046 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 19E2AC25B78 for ; Tue, 28 May 2024 03:19:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CMTWMZWsG8LhJRd0Q0jUhY8w8CqXwPIht84vGTJxPqc=; b=uvIxkzmlYd19ug 4u7wFBpTU1ieeOOKA1s8ImjjQ4bOi77gUUfLqq5EaOzvDyqg0tqsk43KUVvkv1/YwdMk/Kt5BG+A1 OeEFpg7IPVatTVuWgED7USoO8Xu+7y/HR57v0yrxniYiFS3QVBYozgnKrpwiLGAMOTSIEK5/Oon+h ENnsoUI45xoYU4yjZrYX1+OnZrgMqnQ7Zo+/dB1L/FUZ8FfQmUfHxjFf31KM7wnAFmMeZHEtuTHQU QGt4YPDnqhT1fJLcQIZflFWqnarAoE+2lpY3Rs7BUX5we0aQwbNZs1tZajmYKloPZyzTv9SoUsBF3 Gcm8DivfLC46cwBZ1svA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBnN1-0000000GuqE-3TrD; Tue, 28 May 2024 03:19:27 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBnMx-0000000GuoQ-1GNg; Tue, 28 May 2024 03:19:25 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 797F820072A; Tue, 28 May 2024 05:19:18 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id EAF8D200691; Tue, 28 May 2024 05:19:17 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 02CA6181D0E3; Tue, 28 May 2024 11:19:15 +0800 (+08) From: Richard Zhu To: conor@kernel.org, vkoul@kernel.org, kishon@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, frank.li@nxp.com, conor+dt@kernel.org Cc: hongxing.zhu@nxp.com, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, imx@lists.linux.dev Subject: [PATCH v6 1/2] dt-bindings: phy: Add i.MX8Q HSIO SerDes PHY binding Date: Tue, 28 May 2024 10:59:13 +0800 Message-Id: <1716865154-25044-2-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1716865154-25044-1-git-send-email-hongxing.zhu@nxp.com> References: <1716865154-25044-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240527_201923_660500_AD89A8D3 X-CRM114-Status: GOOD ( 13.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add i.MX8QM and i.MX8QXP HSIO SerDes PHY binding. Introduce one HSIO configuration 'fsl,hsio-cfg', which need be set at initialization according to board design. Signed-off-by: Richard Zhu Reviewed-by: Conor Dooley --- .../bindings/phy/fsl,imx8qm-hsio.yaml | 164 ++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/fsl,imx8qm-hsio.yaml diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8qm-hsio.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8qm-hsio.yaml new file mode 100644 index 000000000000..8af342ef3be3 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/fsl,imx8qm-hsio.yaml @@ -0,0 +1,164 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/phy/fsl,imx8qm-hsio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX8QM SoC series High Speed IO(HSIO) SERDES PHY + +maintainers: + - Richard Zhu + +properties: + compatible: + enum: + - fsl,imx8qm-hsio + - fsl,imx8qxp-hsio + reg: + items: + - description: Base address and length of the PHY block + - description: HSIO control and status registers(CSR) of the PHY + - description: HSIO CSR of the controller bound to the PHY + - description: HSIO CSR for MISC + + reg-names: + items: + - const: reg + - const: phy + - const: ctrl + - const: misc + + "#phy-cells": + const: 3 + description: + The first defines lane index. + The second defines the type of the PHY refer to the include phy.h. + The third defines the controller index, indicated which controller + is bound to the lane. + + clocks: + minItems: 5 + maxItems: 14 + + clock-names: + minItems: 5 + maxItems: 14 + + fsl,hsio-cfg: + description: + Specifies the use case of the HSIO module in the hardware design. + Regarding the design of i.MX8QM HSIO subsystem, HSIO module can be + confiured as following three use cases. + +-------------------------------------+ + | | i.MX8QM | + |----------------|--------------------| + | | Lane0| Lane1| Lane2| + |----------------|------|------|------| + | pcieax2sata | PCIEA| PCIEA| SATA | + |----------------|------|------|------| + | pcieax2pcieb | PCIEA| PCIEA| PCIEB| + |----------------|------|------|------| + | pcieapciebsata | PCIEA| PCIEB| SATA | + +-------------------------------------+ + $ref: /schemas/types.yaml#/definitions/string + enum: [ pcieax2sata, pcieax2pcieb, pcieapciebsata] + default: pcieapciebsata + + fsl,refclk-pad-mode: + description: + Specifies the mode of the refclk pad used. INPUT(PHY refclock is + provided externally via the refclk pad) or OUTPUT(PHY refclock is + derived from SoC internal source and provided on the refclk pad). + This property not exists means unused(PHY refclock is derived from + SoC internal source). + $ref: /schemas/types.yaml#/definitions/string + enum: [ input, output, unused ] + default: unused + + power-domains: + minItems: 1 + maxItems: 2 + +required: + - compatible + - reg + - reg-names + - "#phy-cells" + - clocks + - clock-names + - fsl,hsio-cfg + +allOf: + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8qxp-hsio + then: + properties: + clock-names: + items: + - const: pclk0 + - const: apb_pclk0 + - const: phy0_crr + - const: ctl0_crr + - const: misc_crr + power-domains: + maxItems: 1 + + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8qm-hsio + then: + properties: + clock-names: + items: + - const: pclk0 + - const: pclk1 + - const: apb_pclk0 + - const: apb_pclk1 + - const: pclk2 + - const: epcs_tx + - const: epcs_rx + - const: apb_pclk2 + - const: phy0_crr + - const: phy1_crr + - const: ctl0_crr + - const: ctl1_crr + - const: ctl2_crr + - const: misc_crr + power-domains: + minItems: 2 + +additionalProperties: false + +examples: + - | + #include + #include + #include + #include + + phy@5f1a0000 { + compatible = "fsl,imx8qxp-hsio"; + reg = <0x5f1a0000 0x10000>, + <0x5f120000 0x10000>, + <0x5f140000 0x10000>, + <0x5f160000 0x10000>; + reg-names = "reg", "phy", "ctrl", "misc"; + clocks = <&phyx1_lpcg IMX_LPCG_CLK_0>, + <&phyx1_lpcg IMX_LPCG_CLK_4>, + <&phyx1_crr1_lpcg IMX_LPCG_CLK_4>, + <&pcieb_crr3_lpcg IMX_LPCG_CLK_4>, + <&misc_crr5_lpcg IMX_LPCG_CLK_4>; + clock-names = "pclk0", "apb_pclk0", "phy0_crr", "ctl0_crr", "misc_crr"; + power-domains = <&pd IMX_SC_R_SERDES_1>; + #phy-cells = <3>; + fsl,hsio-cfg = "pcieapciebsata"; + fsl,refclk-pad-mode = "input"; + }; +... From patchwork Tue May 28 02:59:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongxing Zhu X-Patchwork-Id: 13676047 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E5BACC25B78 for ; Tue, 28 May 2024 03:19:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=W5XRD4T57qte8Wmgl85x4hhLD0JRiCEjJvVVNkgKeqw=; b=bDhIgjoVsNxIyN Rw1i76+moWZmxukT2AnmI5KbWypkxKM5u6hIQyKD/kub2//5YGSsGDiDnj8F+9UGNBydhWPKZkh46 rK0+5y6KnDEDTIxkMyg4o/p1ws5n388WkWiUKM+CSFXgdYq7dU5TJ0RwkAWQLTQ1LeaGodHoYmydA 2RVlxerh9iyK165Qdm/4/BHY+r4NbJS3z9uKsNLBlElIQLu8hlnWYT5bb6Nh9WW9OMug+qcGIzKRm gAJSOCZWfgr5Ec4wWNYmPM/bntZfQqfo/mQh/nf/r5nravaOOqa1t6B1K/z3RnNzMrXsrp/LuvzRx USOLLcm8ClmXw+jAUcXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBnNF-0000000Gux7-0f9J; Tue, 28 May 2024 03:19:41 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBnMx-0000000GuoZ-1MJh; Tue, 28 May 2024 03:19:26 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id BAC55200691; Tue, 28 May 2024 05:19:19 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 37B8B200464; Tue, 28 May 2024 05:19:19 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 45BF0181D0FB; Tue, 28 May 2024 11:19:17 +0800 (+08) From: Richard Zhu To: conor@kernel.org, vkoul@kernel.org, kishon@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, frank.li@nxp.com, conor+dt@kernel.org Cc: hongxing.zhu@nxp.com, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, imx@lists.linux.dev Subject: [PATCH v6 2/2] phy: freescale: imx8qm-hsio: Add i.MX8QM HSIO PHY driver support Date: Tue, 28 May 2024 10:59:14 +0800 Message-Id: <1716865154-25044-3-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1716865154-25044-1-git-send-email-hongxing.zhu@nxp.com> References: <1716865154-25044-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240527_201923_672327_F49AE62E X-CRM114-Status: GOOD ( 23.69 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add i.MX8QM HSIO PHY driver support. i.MX8QM HSIO has three lane PHY instances, and can be bound to the following controllers in the different use cases listed in below table. - two lanes capable PCIEA controller. - one lane PCIEB controller. - AHCI SATA controller. i.MX8QM HSIO PHYs support the following use cases. +----------------------------------------------------+ | | Lane0| Lane1| Lane2| |-------------------------------|------|------|------| | use case 1: PCIEAX2SATA | PCIEA| PCIEA| SATA | |-------------------------------|------|------|------| | use case 2: PCIEAX2PCIEB | PCIEA| PCIEA| PCIEB| |-------------------------------|------|------|------| | use case 3: PCIEAPCIEBSATA | PCIEA| PCIEB| SATA | +----------------------------------------------------+ Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/phy/freescale/Kconfig | 8 + drivers/phy/freescale/Makefile | 1 + drivers/phy/freescale/phy-fsl-imx8qm-hsio.c | 612 ++++++++++++++++++++ 3 files changed, 621 insertions(+) create mode 100644 drivers/phy/freescale/phy-fsl-imx8qm-hsio.c diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig index 853958fb2c06..c9ee48aeea9e 100644 --- a/drivers/phy/freescale/Kconfig +++ b/drivers/phy/freescale/Kconfig @@ -35,6 +35,14 @@ config PHY_FSL_IMX8M_PCIE Enable this to add support for the PCIE PHY as found on i.MX8M family of SOCs. +config PHY_FSL_IMX8QM_HSIO + tristate "Freescale i.MX8QM HSIO PHY" + depends on OF && HAS_IOMEM + select GENERIC_PHY + help + Enable this to add support for the HSIO PHY as found on + i.MX8QM family of SOCs. + endif config PHY_FSL_LYNX_28G diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile index cedb328bc4d2..b56b4d5c18ea 100644 --- a/drivers/phy/freescale/Makefile +++ b/drivers/phy/freescale/Makefile @@ -3,4 +3,5 @@ obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o +obj-$(CONFIG_PHY_FSL_IMX8QM_HSIO) += phy-fsl-imx8qm-hsio.o obj-$(CONFIG_PHY_FSL_LYNX_28G) += phy-fsl-lynx-28g.o diff --git a/drivers/phy/freescale/phy-fsl-imx8qm-hsio.c b/drivers/phy/freescale/phy-fsl-imx8qm-hsio.c new file mode 100644 index 000000000000..73e0c50fcdae --- /dev/null +++ b/drivers/phy/freescale/phy-fsl-imx8qm-hsio.c @@ -0,0 +1,612 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2024 NXP + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define MAX_NUM_LANE 3 +#define LANE_NUM_CLKS 5 + +/* Parameters for the waiting for PCIe PHY PLL to lock */ +#define PHY_INIT_WAIT_USLEEP_MAX 10 +#define PHY_INIT_WAIT_TIMEOUT (1000 * PHY_INIT_WAIT_USLEEP_MAX) + +/* i.MX8Q HSIO registers */ +#define HSIO_CTRL0 0x0 +#define HSIO_APB_RSTN_0 BIT(0) +#define HSIO_APB_RSTN_1 BIT(1) +#define HSIO_PIPE_RSTN_0_MASK GENMASK(25, 24) +#define HSIO_PIPE_RSTN_1_MASK GENMASK(27, 26) +#define HSIO_MODE_MASK GENMASK(20, 17) +#define HSIO_MODE_PCIE 0x0 +#define HSIO_MODE_SATA 0x4 +#define HSIO_DEVICE_TYPE_MASK GENMASK(27, 24) +#define HSIO_EPCS_TXDEEMP BIT(5) +#define HSIO_EPCS_TXDEEMP_SEL BIT(6) +#define HSIO_EPCS_PHYRESET_N BIT(7) +#define HSIO_RESET_N BIT(12) + +#define HSIO_IOB_RXENA BIT(0) +#define HSIO_IOB_TXENA BIT(1) +#define HSIO_IOB_A_0_TXOE BIT(2) +#define HSIO_IOB_A_0_M1M0_2 BIT(4) +#define HSIO_IOB_A_0_M1M0_MASK GENMASK(4, 3) +#define HSIO_PHYX1_EPCS_SEL BIT(12) +#define HSIO_PCIE_AB_SELECT BIT(13) + +#define HSIO_PHY_STS0 0x4 +#define HSIO_LANE0_TX_PLL_LOCK BIT(4) +#define HSIO_LANE1_TX_PLL_LOCK BIT(12) + +#define HSIO_CTRL2 0x8 +#define HSIO_LTSSM_ENABLE BIT(4) +#define HSIO_BUTTON_RST_N BIT(21) +#define HSIO_PERST_N BIT(22) +#define HSIO_POWER_UP_RST_N BIT(23) + +#define HSIO_PCIE_STS0 0xc +#define HSIO_PM_REQ_CORE_RST BIT(19) + +#define HSIO_REG48_PMA_STATUS 0x30 +#define HSIO_REG48_PMA_RDY BIT(7) + +struct imx_hsio_drvdata { + int lane_num; +}; + +struct imx_hsio_lane { + u32 ctrl_index; + u32 ctrl_off; + u32 idx; + u32 phy_off; + u32 phy_type; + const char * const *clk_names; + struct clk_bulk_data clks[LANE_NUM_CLKS]; + struct imx_hsio_priv *priv; + struct phy *phy; + enum phy_mode phy_mode; +}; + +struct imx_hsio_priv { + void __iomem *base; + struct device *dev; + struct mutex lock; + const char *hsio_cfg; + const char *refclk_pad; + u32 open_cnt; + struct regmap *phy; + struct regmap *ctrl; + struct regmap *misc; + const struct imx_hsio_drvdata *drvdata; + struct imx_hsio_lane lane[MAX_NUM_LANE]; +}; + +static const char * const lan0_pcie_clks[] = {"apb_pclk0", "pclk0", "ctl0_crr", + "phy0_crr", "misc_crr"}; +static const char * const lan1_pciea_clks[] = {"apb_pclk1", "pclk1", "ctl0_crr", + "phy0_crr", "misc_crr"}; +static const char * const lan1_pcieb_clks[] = {"apb_pclk1", "pclk1", "ctl1_crr", + "phy0_crr", "misc_crr"}; +static const char * const lan2_pcieb_clks[] = {"apb_pclk2", "pclk2", "ctl1_crr", + "phy1_crr", "misc_crr"}; +static const char * const lan2_sata_clks[] = {"pclk2", "epcs_tx", "epcs_rx", + "phy1_crr", "misc_crr"}; + +static const struct regmap_config regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int imx_hsio_init(struct phy *phy) +{ + int ret, i; + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + struct device *dev = priv->dev; + + /* Assign clocks refer to different modes */ + switch (lane->phy_type) { + case PHY_TYPE_PCIE: + lane->phy_mode = PHY_MODE_PCIE; + if (lane->ctrl_index == 0) { /* PCIEA */ + lane->ctrl_off = 0; + lane->phy_off = 0; + + for (i = 0; i < LANE_NUM_CLKS; i++) { + if (lane->idx == 0) + lane->clks[i].id = lan0_pcie_clks[i]; + else + lane->clks[i].id = lan1_pciea_clks[i]; + } + } else { /* PCIEB */ + if (lane->idx == 0) { /* i.MX8QXP */ + lane->ctrl_off = 0; + lane->phy_off = 0; + } else { + /* + * On i.MX8QM, only second or third lane can be + * bound to PCIEB. + */ + lane->ctrl_off = SZ_64K; + if (lane->idx == 1) + lane->phy_off = 0; + else /* the third lane is bound to PCIEB */ + lane->phy_off = SZ_64K; + } + + for (i = 0; i < LANE_NUM_CLKS; i++) { + if (lane->idx == 1) + lane->clks[i].id = lan1_pcieb_clks[i]; + else if (lane->idx == 2) + lane->clks[i].id = lan2_pcieb_clks[i]; + else /* i.MX8QXP only has PCIEB, idx is 0 */ + lane->clks[i].id = lan0_pcie_clks[i]; + } + } + break; + case PHY_TYPE_SATA: + /* On i.MX8QM, only the third lane can be bound to SATA */ + lane->phy_mode = PHY_MODE_SATA; + lane->ctrl_off = SZ_128K; + lane->phy_off = SZ_64K; + + for (i = 0; i < LANE_NUM_CLKS; i++) + lane->clks[i].id = lan2_sata_clks[i]; + break; + default: + return -EINVAL; + } + + /* Fetch clocks and enable them */ + ret = devm_clk_bulk_get(dev, LANE_NUM_CLKS, lane->clks); + if (ret) + return ret; + ret = clk_bulk_prepare_enable(LANE_NUM_CLKS, lane->clks); + if (ret) + return ret; + + /* allow the clocks to stabilize */ + usleep_range(200, 500); + return 0; +} + +static int imx_hsio_exit(struct phy *phy) +{ + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + + clk_bulk_disable_unprepare(LANE_NUM_CLKS, lane->clks); + + return 0; +} + +static void imx_hsio_pcie_phy_resets(struct phy *phy) +{ + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + regmap_clear_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_BUTTON_RST_N); + regmap_clear_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_PERST_N); + regmap_clear_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_POWER_UP_RST_N); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_BUTTON_RST_N); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_PERST_N); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_POWER_UP_RST_N); + + if (lane->idx == 1) { + regmap_set_bits(priv->phy, lane->phy_off + HSIO_CTRL0, + HSIO_APB_RSTN_1); + regmap_set_bits(priv->phy, lane->phy_off + HSIO_CTRL0, + HSIO_PIPE_RSTN_1_MASK); + } else { + regmap_set_bits(priv->phy, lane->phy_off + HSIO_CTRL0, + HSIO_APB_RSTN_0); + regmap_set_bits(priv->phy, lane->phy_off + HSIO_CTRL0, + HSIO_PIPE_RSTN_0_MASK); + } +} + +static void imx_hsio_sata_phy_resets(struct phy *phy) +{ + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + /* clear PHY RST, then set it */ + regmap_clear_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, + HSIO_EPCS_PHYRESET_N); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, + HSIO_EPCS_PHYRESET_N); + + /* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */ + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, HSIO_RESET_N); + udelay(1); + regmap_clear_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, + HSIO_RESET_N); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, HSIO_RESET_N); +} + +static void imx_hsio_configure_clk_pad(struct phy *phy) +{ + bool pll = false; + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + if (strncmp(priv->refclk_pad, "output", 6) == 0) { + pll = true; + regmap_update_bits(priv->misc, HSIO_CTRL0, + HSIO_IOB_A_0_TXOE | HSIO_IOB_A_0_M1M0_MASK, + HSIO_IOB_A_0_TXOE | HSIO_IOB_A_0_M1M0_2); + } else { + regmap_update_bits(priv->misc, HSIO_CTRL0, + HSIO_IOB_A_0_TXOE | HSIO_IOB_A_0_M1M0_MASK, + 0); + } + + regmap_update_bits(priv->misc, HSIO_CTRL0, HSIO_IOB_RXENA, + pll ? 0 : HSIO_IOB_RXENA); + regmap_update_bits(priv->misc, HSIO_CTRL0, HSIO_IOB_TXENA, + pll ? HSIO_IOB_TXENA : 0); +} + +static void imx_hsio_pre_set(struct phy *phy) +{ + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + if (strncmp(priv->hsio_cfg, "pcieax2pcieb", 10) == 0) { + regmap_set_bits(priv->misc, HSIO_CTRL0, HSIO_PCIE_AB_SELECT); + } else if (strncmp(priv->hsio_cfg, "pcieax2sata", 9) == 0) { + regmap_set_bits(priv->misc, HSIO_CTRL0, HSIO_PHYX1_EPCS_SEL); + } else if (strncmp(priv->hsio_cfg, "pcieapciebsata", 12) == 0) { + regmap_set_bits(priv->misc, HSIO_CTRL0, HSIO_PCIE_AB_SELECT); + regmap_set_bits(priv->misc, HSIO_CTRL0, HSIO_PHYX1_EPCS_SEL); + } + + imx_hsio_configure_clk_pad(phy); +} + +static int imx_hsio_pcie_power_on(struct phy *phy) +{ + int ret; + u32 val, addr, cond; + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + imx_hsio_pcie_phy_resets(phy); + + /* Toggle apb_pclk to make sure PM_REQ_CORE_RST is cleared. */ + clk_disable_unprepare(lane->clks[0].clk); + mdelay(1); + ret = clk_prepare_enable(lane->clks[0].clk); + if (ret) { + dev_err(priv->dev, "unable to enable phy apb_pclk\n"); + return ret; + } + + addr = lane->ctrl_off + HSIO_PCIE_STS0; + cond = HSIO_PM_REQ_CORE_RST; + ret = regmap_read_poll_timeout(priv->ctrl, addr, val, + (val & cond) == 0, + PHY_INIT_WAIT_USLEEP_MAX, + PHY_INIT_WAIT_TIMEOUT); + if (ret) + dev_err(priv->dev, "HSIO_PM_REQ_CORE_RST is set\n"); + return ret; +} + +static int imx_hsio_sata_power_on(struct phy *phy) +{ + int ret; + u32 val, cond; + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + regmap_set_bits(priv->phy, lane->phy_off + HSIO_CTRL0, HSIO_APB_RSTN_0); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, + HSIO_EPCS_TXDEEMP); + regmap_set_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, + HSIO_EPCS_TXDEEMP_SEL); + + imx_hsio_sata_phy_resets(phy); + + cond = HSIO_REG48_PMA_RDY; + ret = read_poll_timeout(readb, val, ((val & cond) == cond), + PHY_INIT_WAIT_USLEEP_MAX, + PHY_INIT_WAIT_TIMEOUT, false, + priv->base + HSIO_REG48_PMA_STATUS); + if (ret) + dev_err(priv->dev, "PHY calibration is timeout\n"); + else + dev_dbg(priv->dev, "PHY calibration is done\n"); + + return ret; +} + +static int imx_hsio_power_on(struct phy *phy) +{ + int ret; + u32 val, cond; + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + scoped_guard(mutex, &priv->lock) { + if (!priv->open_cnt) + imx_hsio_pre_set(phy); + priv->open_cnt++; + } + + if (lane->phy_mode == PHY_MODE_PCIE) + ret = imx_hsio_pcie_power_on(phy); + else /* SATA */ + ret = imx_hsio_sata_power_on(phy); + if (ret) + return ret; + + /* Polling to check the PHY is ready or not. */ + if (lane->idx == 1) + cond = HSIO_LANE1_TX_PLL_LOCK; + else + /* + * Except the phy_off, the bit-offset of lane2 is same to lane0. + * Merge the lane0 and lane2 bit-operations together. + */ + cond = HSIO_LANE0_TX_PLL_LOCK; + + ret = regmap_read_poll_timeout(priv->phy, lane->phy_off + HSIO_PHY_STS0, + val, ((val & cond) == cond), + PHY_INIT_WAIT_USLEEP_MAX, + PHY_INIT_WAIT_TIMEOUT); + if (ret) { + dev_err(priv->dev, "IMX8Q PHY%d PLL lock timeout\n", lane->idx); + return ret; + } + dev_dbg(priv->dev, "IMX8Q PHY%d PLL is locked\n", lane->idx); + + return ret; +} + +static int imx_hsio_power_off(struct phy *phy) +{ + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + scoped_guard(mutex, &priv->lock) { + priv->open_cnt--; + if (priv->open_cnt == 0) { + regmap_clear_bits(priv->misc, HSIO_CTRL0, + HSIO_PCIE_AB_SELECT); + regmap_clear_bits(priv->misc, HSIO_CTRL0, + HSIO_PHYX1_EPCS_SEL); + + if (lane->phy_mode == PHY_MODE_PCIE) { + regmap_clear_bits(priv->ctrl, + lane->ctrl_off + HSIO_CTRL2, + HSIO_BUTTON_RST_N); + regmap_clear_bits(priv->ctrl, + lane->ctrl_off + HSIO_CTRL2, + HSIO_PERST_N); + regmap_clear_bits(priv->ctrl, + lane->ctrl_off + HSIO_CTRL2, + HSIO_POWER_UP_RST_N); + } else { + regmap_clear_bits(priv->ctrl, + lane->ctrl_off + HSIO_CTRL0, + HSIO_EPCS_TXDEEMP); + regmap_clear_bits(priv->ctrl, + lane->ctrl_off + HSIO_CTRL0, + HSIO_EPCS_TXDEEMP_SEL); + regmap_clear_bits(priv->ctrl, + lane->ctrl_off + HSIO_CTRL0, + HSIO_RESET_N); + } + + if (lane->idx == 1) { + regmap_clear_bits(priv->phy, + lane->phy_off + HSIO_CTRL0, + HSIO_APB_RSTN_1); + regmap_clear_bits(priv->phy, + lane->phy_off + HSIO_CTRL0, + HSIO_PIPE_RSTN_1_MASK); + } else { + /* + * Except the phy_off, the bit-offset of lane2 is same + * to lane0. Merge the lane0 and lane2 bit-operations + * together. + */ + regmap_clear_bits(priv->phy, + lane->phy_off + HSIO_CTRL0, + HSIO_APB_RSTN_0); + regmap_clear_bits(priv->phy, + lane->phy_off + HSIO_CTRL0, + HSIO_PIPE_RSTN_0_MASK); + } + } + } + + return 0; +} + +static int imx_hsio_set_mode(struct phy *phy, enum phy_mode mode, + int submode) +{ + u32 val; + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + if (lane->phy_mode != mode) + return -EINVAL; + + val = (mode == PHY_MODE_PCIE) ? HSIO_MODE_PCIE : HSIO_MODE_SATA; + val = FIELD_PREP(HSIO_MODE_MASK, val); + regmap_update_bits(priv->phy, lane->phy_off + HSIO_CTRL0, + HSIO_MODE_MASK, val); + + switch (submode) { + case PHY_MODE_PCIE_RC: + val = FIELD_PREP(HSIO_DEVICE_TYPE_MASK, PCI_EXP_TYPE_ROOT_PORT); + break; + case PHY_MODE_PCIE_EP: + val = FIELD_PREP(HSIO_DEVICE_TYPE_MASK, PCI_EXP_TYPE_ENDPOINT); + break; + default: /* Support only PCIe EP and RC now. */ + return 0; + } + if (submode) + regmap_update_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL0, + HSIO_DEVICE_TYPE_MASK, val); + + return 0; +} + +static int imx_hsio_set_speed(struct phy *phy, int speed) +{ + struct imx_hsio_lane *lane = phy_get_drvdata(phy); + struct imx_hsio_priv *priv = lane->priv; + + regmap_update_bits(priv->ctrl, lane->ctrl_off + HSIO_CTRL2, + HSIO_LTSSM_ENABLE, + speed ? HSIO_LTSSM_ENABLE : 0); + return 0; +} + +static const struct phy_ops imx_hsio_ops = { + .init = imx_hsio_init, + .exit = imx_hsio_exit, + .power_on = imx_hsio_power_on, + .power_off = imx_hsio_power_off, + .set_mode = imx_hsio_set_mode, + .set_speed = imx_hsio_set_speed, + .owner = THIS_MODULE, +}; + +static const struct imx_hsio_drvdata imx8qxp_hsio_drvdata = { + .lane_num = 0x1, +}; + +static const struct imx_hsio_drvdata imx_hsio_drvdata = { + .lane_num = 0x3, +}; + +static const struct of_device_id imx_hsio_of_match[] = { + {.compatible = "fsl,imx8qm-hsio", .data = &imx_hsio_drvdata}, + {.compatible = "fsl,imx8qxp-hsio", .data = &imx8qxp_hsio_drvdata}, + { }, +}; +MODULE_DEVICE_TABLE(of, imx_hsio_of_match); + +static struct phy *imx_hsio_xlate(struct device *dev, + const struct of_phandle_args *args) +{ + struct imx_hsio_priv *priv = dev_get_drvdata(dev); + int idx = args->args[0]; + int phy_type = args->args[1]; + int ctrl_index = args->args[2]; + + if (idx < 0 || idx >= priv->drvdata->lane_num) + return ERR_PTR(-EINVAL); + priv->lane[idx].idx = idx; + priv->lane[idx].phy_type = phy_type; + priv->lane[idx].ctrl_index = ctrl_index; + + return priv->lane[idx].phy; +} + +static int imx_hsio_probe(struct platform_device *pdev) +{ + int i; + void __iomem *off; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct imx_hsio_priv *priv; + struct phy_provider *provider; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + priv->dev = &pdev->dev; + priv->drvdata = of_device_get_match_data(dev); + + /* Get HSIO configuration mode */ + if (of_property_read_string(np, "fsl,hsio-cfg", &priv->hsio_cfg)) + priv->hsio_cfg = "pcieapciebsata"; + /* Get PHY refclk pad mode */ + if (of_property_read_string(np, "fsl,refclk-pad-mode", + &priv->refclk_pad)) + priv->refclk_pad = NULL; + + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + off = devm_platform_ioremap_resource_byname(pdev, "phy"); + priv->phy = devm_regmap_init_mmio(dev, off, ®map_config); + if (IS_ERR(priv->phy)) + return dev_err_probe(dev, PTR_ERR(priv->phy), + "unable to find phy csr registers\n"); + + off = devm_platform_ioremap_resource_byname(pdev, "ctrl"); + priv->ctrl = devm_regmap_init_mmio(dev, off, ®map_config); + if (IS_ERR(priv->ctrl)) + return dev_err_probe(dev, PTR_ERR(priv->ctrl), + "unable to find ctrl csr registers\n"); + + off = devm_platform_ioremap_resource_byname(pdev, "misc"); + priv->misc = devm_regmap_init_mmio(dev, off, ®map_config); + if (IS_ERR(priv->misc)) + return dev_err_probe(dev, PTR_ERR(priv->misc), + "unable to find misc csr registers\n"); + + for (i = 0; i < priv->drvdata->lane_num; i++) { + struct imx_hsio_lane *lane = &priv->lane[i]; + struct phy *phy; + + memset(lane, 0, sizeof(*lane)); + + phy = devm_phy_create(&pdev->dev, NULL, &imx_hsio_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + lane->priv = priv; + lane->phy = phy; + lane->idx = i; + phy_set_drvdata(phy, lane); + } + + dev_set_drvdata(dev, priv); + dev_set_drvdata(&pdev->dev, priv); + + provider = devm_of_phy_provider_register(&pdev->dev, imx_hsio_xlate); + + return PTR_ERR_OR_ZERO(provider); +} + +static struct platform_driver imx_hsio_driver = { + .probe = imx_hsio_probe, + .driver = { + .name = "imx8qm-hsio-phy", + .of_match_table = imx_hsio_of_match, + } +}; +module_platform_driver(imx_hsio_driver); + +MODULE_DESCRIPTION("FSL IMX8QM HSIO SERDES PHY driver"); +MODULE_LICENSE("GPL");